Structural basis for the activity of drugs that inhibit phosphodiesterases.

Article Details

Citation

Card GL, England BP, Suzuki Y, Fong D, Powell B, Lee B, Luu C, Tabrizizad M, Gillette S, Ibrahim PN, Artis DR, Bollag G, Milburn MV, Kim SH, Schlessinger J, Zhang KY

Structural basis for the activity of drugs that inhibit phosphodiesterases.

Structure. 2004 Dec;12(12):2233-47.

PubMed ID
15576036 [ View in PubMed
]
Abstract

Phosphodiesterases (PDEs) comprise a large family of enzymes that catalyze the hydrolysis of cAMP or cGMP and are implicated in various diseases. We describe the high-resolution crystal structures of the catalytic domains of PDE4B, PDE4D, and PDE5A with ten different inhibitors, including the drug candidates cilomilast and roflumilast, for respiratory diseases. These cocrystal structures reveal a common scheme of inhibitor binding to the PDEs: (i) a hydrophobic clamp formed by highly conserved hydrophobic residues that sandwich the inhibitor in the active site; (ii) hydrogen bonding to an invariant glutamine that controls the orientation of inhibitor binding. A scaffold can be readily identified for any given inhibitor based on the formation of these two types of conserved interactions. These structural insights will enable the design of isoform-selective inhibitors with improved binding affinity and should facilitate the discovery of more potent and selective PDE inhibitors for the treatment of a variety of diseases.

DrugBank Data that Cites this Article

Polypeptides
NameUniProt ID
cAMP-specific 3',5'-cyclic phosphodiesterase 4BQ07343Details
cAMP-specific 3',5'-cyclic phosphodiesterase 4DQ08499Details